Difference between #3 and #2 of History Autocomplete

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Title
History Autocomplete
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Category
How-tos
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Tags
autocomplete
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Content
What for?
------------------

In application development we often have to choose how to mange recurrent
values.

For example, a field color for a cloath. You cannot leave free text, because
there whould be too much typos, but you cannot enumerate all possibility because
they are a lot and sometime there are new colors.

Often you can solve with a foreign field, with an interface for add a new color.
That's great if adding new color is a quite rare operation, if it happens too
often and if the users are too stupid for remember how to add a color, it can be
odd.

I propose an half way solution: a free text with autocomplete based on history
values.

We will use CJuiAutoComplete, what we need is a efficient way for perform
searches.

Add this to your components/extensions:

~~~
[php]
class SearchAction  extends CAction
{
	public $model;
	public $attribute;
	public $criteria=array('limit'=>5);
	
	public function run()
    {
 
 
        $criteria=new	{
 		$criteria=new CDbCriteria($this->criteria);
        $criteria->addCondition("{$this->attribute}
		$criteria->addCondition("{$this->attribute} IS NOT NULL AND
{$this->attribute} LIKE :param");

		$criteria->group=$this->attribute;
       
$criteria->order="COUNT({$this->attribute})		$criteria->order="COUNT({$this->attribute})
desc";
		$criteria->params[':param']='%'.$_GET['term'].'%';
 
        $results=array();
        foreach		$results=array();
		foreach (CActiveRecord::model($this->model)->findAll($criteria) as
$record)
            $results[]=$record->{$this->attribute};
			$results[]=$record->{$this->attribute}; 
 
        echo		echo CJSON::encode($results);
 
    }
	
 	}
}

~~~

Now we can configure a search action in our controller like that:



~~~
[php]
	publicpublic function actions()
	{
		return
{
	return array(
			'searchCompany'=>array(
				'class'=>'SearchAction',
				'model'=>'Request',
				'attribute'=>'company',
			)
		);
	}	
		'searchCompany'=>array(
			'class'=>'SearchAction',
			'model'=>'Request',
			'attribute'=>'company',
		)
	);
}	
~~~



You can pass additional configuration for the search (e.g, some more condition
limiting the search in a project/group, sorting or whatever else) using the
property $criteria.


Now you can create your search textfield as:


~~~
[php]
<?php $this->widget('zii.widgets.jui.CJuiAutoComplete', 
   array('model'=>$model,
   'attribute'=>'company', 
    'htmlOptions'=>	array('model'=>$model,
	'attribute'=>'company', 
	'htmlOptions'=> array('maxlength'=>300, 'class'=>'text'),
   'sourceUrl'=>'searchCompany'));?>
	'sourceUrl'=>'searchCompany'));?>
~~~

This method is quite efficient and usually customer like it, because is based on
the laziness of the users.